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- W2979063670 abstract "Bacteriophytochromes are photoreceptors that regulate various physiological processes induced by photoisomerization in a linear tetrapyrrole chromophore upon red/far-red light absorption. Here, we investigate the photoinduced Pfr-state isomerization mechanism of a bathy bacteriophytochrome from Pseudomonas aeruginosa combining femtosecond-resolved fluorescence and absorption methods. We observed initial coherent oscillation motions in the first 1 ps with low-frequency modes below 60 cm–1, then a bifurcation of the wavepacket with the distinct excited-state lifetimes in a few picoseconds, and finally chromophore–protein coupled ground-state conformational evolution on nanosecond time scales. Together with systematic mutational studies, we revealed the critical roles of hydrogen bonds in tuning the photoisomerization dynamics. These results provide a clear molecular picture of the Pfr-state photoisomerization, a mechanism likely applicable to the other phytochromes." @default.
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- W2979063670 date "2019-10-02" @default.
- W2979063670 modified "2023-10-17" @default.
- W2979063670 title "Elucidating the Molecular Mechanism of Ultrafast Pfr-State Photoisomerization in Bathy Bacteriophytochrome PaBphP" @default.
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- W2979063670 doi "https://doi.org/10.1021/acs.jpclett.9b02446" @default.
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